Title:
LOW CR FERRITIC STAINLESS STEEL HAVING EXCELLENT DAMPING CAPACITY AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/004710
Kind Code:
A1
Abstract:
Disclosed are a low Cr ferritic stainless steel having excellent damping capacity to absorb external vibrational energy through precipitate control and a method for manufacturing same. A low Cr ferritic stainless steel having excellent damping capacity according to one embodiment of the present invention comprises, by weight percent: C: 0.005 to 0.01%; N: 0.005 to 0.01%; Si: 0.1 to 0.9%; Mn: 0.1 to 0.9%; Cr: 9 to 14%; Ni: 0.3% or less; P: 0.04% or less; S: 0.002% or less; Ti: 0.15 to 0.3%; Nb: 0.15 to 0.3%; Cu: 0.15 to 0.3%; Al: 0.01 to 0.05%; and the balance being Fe and inevitable impurities, wherein the low Cr ferritic stainless steel having excellent damping capacity includes 5×102/㎟ or greater of Nb-Laves phase precipitates and Cu precipitates.
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Inventors:
JUNG IL CHAN (KR)
RYU SEUNG HEE (KR)
LEE KYE-MAN (KR)
RYU SEUNG HEE (KR)
LEE KYE-MAN (KR)
Application Number:
PCT/KR2018/010699
Publication Date:
January 02, 2020
Filing Date:
September 12, 2018
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/50; C21D6/00; C22C38/00; C22C38/02; C22C38/04; C22C38/06; C22C38/42; C22C38/48
Foreign References:
| JP2009299182A | 2009-12-24 | |||
| CN102234740A | 2011-11-09 | |||
| KR101762046B1 | 2017-07-26 | |||
| JP2010070799A | 2010-04-02 |
Other References:
KOBAYASHI ET AL.: "Effect of Nb Addition on Cu Precipitation in Ferritic Stainless Steel", ISIJ INTERNATIONAL, vol. 51, no. 4, 2011, pages 657 - 662, XP055666762
See also references of EP 3795711A4
See also references of EP 3795711A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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